Currently if report_error_detected() or report_mmio_enabled()
functions requests PCI_ERS_RESULT_NEED_RESET, current
pcie_do_recovery() implementation does not do the requested
explicit device reset, but instead just calls the
report_slot_reset() on all affected devices. Notifying about the
reset via report_slot_reset() without doing the actual device
reset is incorrect. So call pci_bus_reset() before triggering
->slot_reset() callback.
Signed-off-by: Kuppuswamy Sathyanarayanan
<sathyanarayanan.kuppusw...@linux.intel.com>
Reviewed-by: Sinan Kaya <ok...@kernel.org>
Reviewed-by: Ashok Raj <ashok....@intel.com>
---
Changes since v7:
* Rebased on top of v5.11-rc1.
Changes since v7:
* Rebased on top of v5.10-rc1.
Changes since v6:
* None.
Changes since v5:
* Added Ashok's Reviewed-by tag.
Changes since v4:
* Added check for pci_reset_bus() return value.
drivers/pci/pcie/err.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/drivers/pci/pcie/err.c b/drivers/pci/pcie/err.c
index 510f31f0ef6d..6c19e9948232 100644
--- a/drivers/pci/pcie/err.c
+++ b/drivers/pci/pcie/err.c
@@ -177,6 +177,7 @@ pci_ers_result_t pcie_do_recovery(struct pci_dev *dev,
struct pci_dev *bridge;
pci_ers_result_t status = PCI_ERS_RESULT_CAN_RECOVER;
struct pci_host_bridge *host = pci_find_host_bridge(dev->bus);
+ int ret;
/*
* If the error was detected by a Root Port, Downstream Port, RCEC,
@@ -214,11 +215,12 @@ pci_ers_result_t pcie_do_recovery(struct pci_dev *dev,
}
if (status == PCI_ERS_RESULT_NEED_RESET) {
- /*
- * TODO: Should call platform-specific
- * functions to reset slot before calling
- * drivers' slot_reset callbacks?
- */
+ ret = pci_reset_bus(bridge);
+ if (ret < 0) {
+ pci_err(dev, "Failed to reset %d\n", ret);
+ status = PCI_ERS_RESULT_DISCONNECT;
+ goto failed;
+ }
status = PCI_ERS_RESULT_RECOVERED;
pci_dbg(bridge, "broadcast slot_reset message\n");
pci_walk_bridge(bridge, report_slot_reset, &status);
--
2.25.1
